10139691 has 4 divisors (see below), whose sum is σ = 13519592. Its totient is φ = 6759792.

The previous prime is 10139671. The next prime is 10139699. The reversal of 10139691 is 19693101.

10139691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10139691 - 2⁵ = 10139659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10139699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689946 + ... + 1689951.

It is an arithmetic number, because the mean of its divisors is an integer number (3379898).

Almost surely, 2^10139691 is an apocalyptic number.

10139691 is a deficient number, since it is larger than the sum of its proper divisors (3379901).

10139691 is an equidigital number, since it uses as much as digits as its factorization.

10139691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379900.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 10139691 is about 3184.2881465094. The cubic root of 10139691 is about 216.4420175164.

The spelling of 10139691 in words is "ten million, one hundred thirty-nine thousand, six hundred ninety-one".